Document Differences Analysis and Presentation

5. The non-transitory computer readable medium of claim 1, wherein a description of the at least one of the changes comprises a markup showing the at least one of the changes, and wherein the change data comprises a summary of two or more changes grouped together based on a commonality between the two or more changes, the second graphical user interface further displaying a user interface object that, when activated, causes the second graphical user interface to expand the summary of the two or more changes to display respective details pertaining to the two or more changes.

8. The method of claim 7, further comprising quantifying a number of differences between the first paragraph and the second paragraph, and wherein an abstraction indicates the number of differences between the first paragraph and the second paragraph.

9. The method of claim 6, wherein the differences comprise at least one of a format change or a metadata change, wherein an abstraction identifies the at least one of the format change or the metadata change.

11. The method of claim 6, wherein the differences comprise at least one of a font change or a paragraph indentation.

12. The method of claim 6, wherein an abstraction indicates that the change dad in the content item alters a semantic meaning of the content item.

13. The method of claim 6, wherein the content item is shared between at least two user accounts through the content management system.

16. The method of claim 6, wherein the data is further effective to: causing display of a version history including the differences and comments associated with the first version and a second version of the content item.

20. The system of claim 17, wherein the change data comprises an indication of an activity status of a user account associated with an author of one or more of the changes.